121011440020321 has 4 divisors (see below), whose sum is σ = 123962938557444. Its totient is φ = 118059941483200.

The previous prime is 121011440020307. The next prime is 121011440020369. The reversal of 121011440020321 is 123020044110121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8058416400225 + 112953023620096 = 2838735^2 + 10627936^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011440020321 - 2¹⁵ = 121011439987553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011440020292 and 121011440020301.

It is not an unprimeable number, because it can be changed into a prime (121011440020391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475749268500 + ... + 1475749268581.

It is an arithmetic number, because the mean of its divisors is an integer number (30990734639361).

Almost surely, 2^{121011440020321} is an apocalyptic number.

It is an amenable number.

121011440020321 is a deficient number, since it is larger than the sum of its proper divisors (2951498537123).

121011440020321 is an equidigital number, since it uses as much as digits as its factorization.

121011440020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951498537122.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 121011440020321 its reverse (123020044110121), we get a palindrome (244031484130442).

The spelling of 121011440020321 in words is "one hundred twenty-one trillion, eleven billion, four hundred forty million, twenty thousand, three hundred twenty-one".